Elmer a



(No Model.)

No. 446,030. Patented Feb. 10,1891.

f X I? W 0M (59 Ja "zeey UNITED STATES PATENT OEEIcE.

ELMER A. SPERRY, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE SPERRY ELEC- TRIC MINING MACHINE COMPANY, OF SAME PLACE.

SYSTEM OF ELECTRICAL DISTRIBUTION FOR MINES.

SPECIFICATION forming part of Letters Patent No. 446,030, dated February 10, 1891. Application filed April 1, 1889. Serial No. 305,582. (No model.) Patented in Belgium April 20, 1889, No. 89,909.

To all whom it 71mg concern-x of such switch through the fuse-box V into Be it known that I, ELMER A. SPERRY, a one of the main leads V, being supported at citizen of the United States, residing at Chisuitable points on the insulators V V. cage, in the county of Cook and State of Illi- From this wire or conductor is supported, by nois, have invented a new and useful Improvethe links V V, the rod V upon which rides ment in Systems of ElectricalDistribution for the roller Y on the trolley Y from the mo- Mines, (for which I have obtained Letters Pattor-car Y are the trucks of such car out of Belgium, No. 89,909, dated April 20, which make contact with the rails V A 0011- 1889,) of which the following is a clear and ductor leads from the trucks along the trolley 10 exact specification. Y to the roller Y thence to the rod V My invention relates to systems of electrilinks V, conductor Y to the switch, and cal distribution for mines for the operation of thence to conductor X and to one pole of the eleetrical'ly-propelled cars and the like and for dynamo. From the other pole of the dynamo the operation of electrical mining-machines leads the conductor V to the switch V, and I5 and the like. when the switch is in operative position this The object is to provide a cheap, simple, conductor makes contact with the conductor and practical method of electrical distribu- V, which passes through the ampere-meter tion. This object I accomplish in the man- Y fuse-box Y and thence to the rail Y. ner illustrated in the accompanying drawings, V is a volt-meter coupled between the con- 20 wherein d uetors Y and V Figure 1 is a plan view of a portion of a The rods V V, on which the roller Y mine and a portion of the surface of the earth moves, are relatively short, so as to form seeabove the same. Fig. 2 is a section of one of 'tions, as shown, and any defect in either seethe main leads in the mine, and Fig. 3 is a tion can be remedied by the removal thereof 25 sectional view showing the base of the shaft or from circuit without interfering with the and leads running therefrom. others. Similar conductors V Y pass in Like parts are indicated by the same letter from the wires Y and Y into each of the main in all of the figures. leads, and they are provided with similarfuse- V is the shaft terminating in the enlarged boxes T V and volt-meters V and ampere- 3o shaft-base Y Y. meters V V V are the main leads running from the \V is the mining-machine, containing an shaft in various directions. Y are the electric motor X a drill actuated therebranch leads therefrom divided up and runby, handle and wheels \V. The motor is ning in such directions as circumstances may connected. at one pole by the conductor W 35 require. with the rail Y and at the pole by the con- V l are the metallic rails of the track runductor IV with the rod or conductor V ning through the various leads and used for Y Y are lights coupled between the rail the purpose of the passage of the electricallyand conductor or in series.

. propelled cars and their transporting devices. The use and operation of my invention are 40 V" Y are freight-cars adapted to run on such as follows: The generator Y being set in optracks, and l the electrically-actuated ears eration, a current will pass over all of the conor motors for such train. They may be pronccted portions of the electrical system. It vided, for example, each with an electric monow the t 'anslating devices-as, for instance, tor Y. motor-cars, mining-machines, dsc.be coupled 5 Y is a dynamo, preferably on the surface between the two conductors in the leads-as, 5 of the earth above, from which lead the wires for example, between the rods V and the rails V and V through the shaft down to the base V -a current will pass through and energize of such shaft and preferably to the two arms such translating devices and set the motor in of the double-pole switch V Y is a conmotion and theminii'ig-machine and the lights 50 duetor leading from one of the contact-points in operation. Either of the leads passing 10o from the shaft-base V V can be thrown in or out of circuit by the operation of the fourpoint switch V one of which switches controls each of such leads.

The arrangement of devices as shown permits of the employment of the rails which are required for the cars in lieu of one of the conductors, and hence makes it possible to operate the system by running one wire in each of the leads. The electrical apparatus shown at the base of the shaft and used to connect the wires in the main leads with the shaftconductors are for the purpose of being able to detect upon each of the main-lead conductors a fault existing, so that it may be quickly disconnected and the rest of the system saved ELMER A. SPERRY. Witnesses:

FRANCIS W. PARKER, CELESTE P. CHAPMAN. 

